CVE-2022-50517

Service interruption via corrupted THP swap metadata

Published Oct 7, 2025 · Updated Oct 7, 2025

Denial of service in Linux 5.19 through 6.0.6 allows local users to cause a soft lockup through memory-mapping pressure. During transparent huge-page splitting in mm/huge_memory.c, the kernel clears a tail page's page->private field even when it stores a swap-cache swp_entry_t, corrupting metadata used during reclaim. Triggering is variable and requires a local workload that drives mmap, pageout, swap cache, and THP splitting; the observed consequence is a CPU soft lockup that interrupts service.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 5.19 through 6.0.6 allows local users to cause a soft lockup through memory-mapping pressure. During transparent huge-page splitting in mm/huge_memory.c, the kernel clears a tail page's page->private field even when it stores a swap-cache swp_entry_t, corrupting metadata used during reclaim. Triggering is variable and requires a local workload that drives mmap, pageout, swap cache, and THP splitting; the observed consequence is a CPU soft lockup that interrupts service.

The record

CVE
CVE-2022-50517
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.19
  2. Affected versionversion=b653db77350c7307a513b81856fe53e94cf42446 <71e2d666ef85d51834d658830f823560c402b8b6
  3. Affected versionversion=b653db77350c7307a513b81856fe53e94cf42446 <8cace0eeb03d6043827faa6cf6c9067a9f05cd9f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=b653db77350c7307a513b81856fe53e94cf42446 <71e2d666ef85d51834d658830f823560c402b8b6; version=b653db77350c7307a513b81856fe53e94cf42446 <8cace0eeb03d6043827faa6cf6c9067a9f05cd9f

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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